Nelson j



(No Model.)

N. J. TUBBS & W. ALLDERDIGE.

PUMP.

Patented Nov. 8, 18811.

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' INVENT'ORS.

WITNESSES.

ATTORN EY o-Lithngnphar. Washingwn.

' UNITED STATES,

PUMP.

PATENT OFFICE.

NELSON J .TUBBS AND WIN SLOW ALLDERDIOE, OF BALTIMORE, MARYLAND.

SPECIFICATION forming part of Letters Patent No. 249,273, dated November 8, 1881. Application filed Angust 22, 1881. (No model.)

To all whom it may concern:

Be it known that we, NELsoN J. TUBES and WINsLoW .ALLDERDIOE, both of Baltimore city, State of Maryland, have invented certain new and useful Improvements in Pumps; and

we hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which-- Figure 1 is a central sectional View of the pump, and Fig. 2 is a similar view of a modified form of valve.

Our invention relates to double-acting sucking and lifting pumps designed to produce a continuous flow of water, and especially adapted for use in narrow or bored wells. The features fitting the device for this purpose do not, however, impair its efficiency or adaptability for general use upon the surface as a waterforcing device.

The invention will first be described, and

then pointed out in the claims.

In the drawings, A A are the barrels, placed in juxtaposition, and provided with pistons and piston-rods a. The rods pass through stuffing-boxes B, having glands b of the usual construction, and are combined with a rock shaft or other equivalent and. well-known means for imparting to the pistons an alter-' nating reciprocating motion in the barrels. The base-piece Z has a nozzle, L, adapted for the attachment thereto ot' the inlet-pipe, should one be used, and opens at l 1 into the barrels AA. Flap-valves M normally close the openings Z. Y

The cap-piece O is c onnected with the base I by tie-bolts at the sides, and between the cap and the upper ends of the barrels is interposed a plate, K, having openings 0 leading from the barrels to the chamber D. From the latter the opening 0 leads to the stand or delivery pipe G. The latter is provided with an shoulders, and are clamped in place by nuts E on the threaded ends f. The sections a of the piston-rods are smaller in diameter than the parts a, and upon them are mounted the valves F, as shown. In operation, as the pistons rise in the barrels a partial vacuum is formed there- 'in and the water rises, lifting the valves M.

On the descent of the pistons the valves D and M fall and the valves F rise, allowing the 1 water to pass the pistons, when, on the next upstroke, it is forced through the openings 0 0 into the delivery-pipe G. The valves (1 close instantly upon the descent of the piston-rods, preventing the water carried up into the chamber D by the ascending piston from following the descending one. v

The construction and arrangement of the piston-valves F are such as to secureimportant results in point of immunity from danger of the pump getting out of order and cheapness and simplicity. The valves themselves are simple disks, and the parts of the piston per forated plates, just as they come from the sand, except that the lower face of the valve and the upper face of the plate J are true'd.

In working the pump submerged or in hot water we dispense with the flap-valves M and use a simple disk, as shown in Fig. 2, its play being limited by pins or studs n. For submerged use we also dispense with the cups j and substitute the ordinary water-packing.

The pump is compact and simple and not liable to get out of repair-points of the greatest importance in pumps which are to be used in narrow or bored wells, or in other places requiring the pump to be raised to the surface eduction valves, as set. forth, the piston-rods valves D and F, the latter being mounted upon [0 a, having reduced portions a e, disk-valves F, reduced portions of the piston-rods, as set perforated piston-disks I J, interposed perforth. forat-ed packing j, and nuts E, substantially as described.

2. In combination with the cylinders, placed in juxtaposition as described, the casing 0 Witnesses: and chamberl,clampingthe cylinders together, R. D. WILLIAMS, the valves M, perforated pistons I J, and. W. A. BERTRAM.

NELSON J. TUBES. WINSLOW ALLDERDIGE. 

